Study on Ratio of Contribution of Heat transfer and Interfacial Phenomena to Ice Adhesion to Cooling Solid Surface

2006年，为了阐明冰附着到冷却固体表面壁面的机理，讨论了传热和界面现象对冰附着的贡献率。并得出了以下结论。去除过程可分为“A类”和“B类”两类，A类和B类分别表现为弹性和粘弹性行为。冰与冷却固体表面界面的剪切力(单位面积冰粘附力)与固体表面能成正比，而与冷却热流成正比。附着能与表面能成正比。阐明了粘附能对剪切功的贡献。2007年，首先结合2006年的结果，测量了一些不同表面状态的样品的剪应力和表面能的温度依赖关系。对于导热系数较高的铜板，讨论了铜表面形成的氧化层对剪应力的影响。最后，利用表面分析的方法，讨论了纳米尺度场相互耦合的宏观尺度场中的除冰行为和冰的附着特性。并得出了以下结论。剪切应力和表面能随温度的降低而增大，两者之间存在近似的相关性。从铜表面去除氧化层后，立即开始形成新的氧化层，然后逐渐形成新的氧化层，并阐明了剪应力与形成的氧化铜层成分的关系。结果表明，纳米尺度场与宏观尺度场耦合的第一步是实现纳米尺度场与宏观尺度场的耦合。

In 2006, in order to clarify a mechanism ice adhesion to a cooling solid surface wall, a ratio of contribution of heat transfer and interfacial phenomena to ice adhesion was discussed. And following conclusions were obtained.1. The removal process could be classified into two types, "Type A" and "Type B", Type A and B showed the elastic and viscoelastic behaviors, respectively.2. The shearing stress (ice adhesion force per unit area) at the interface between ice and the cooling solid surface was proportional to the solid surface energy rather than the cooling heat flux.3. The adhesion energy was proportional to the surface energy.4. Contribution of the adhesion energy to the shearing work was clarified.In 2007, at first, considering the results in 2006, temperature dependencies of shearing stress and surface energy of some samples with various surface states were measured. And, for a cupper plate with higher thermal conductivity, influence of an oxide layer formed on the copper surface on shearing stress was discussed. Finally, using a method of surface analysis, ice removal behavior and ice adhesion characteristic in a macro-scale field clarified were also discussed in a nano-scale field to couple both scale fields each other. And following conclusions were obtained.1. Shearing stress and surface energy increased with decrease in temperature, and a correlation with both was obtained approximately.2. Formation of new oxide layer started immediately after the oxide layer was removed from the copper surface, after that, the formation proceeded gradually, and the relationship between shearing stress and composition of copper oxide layer formed was clarified.3. Qualitative agreement with the results obtained in both fields was obtained approximately.From the above, the first step to couple the nano-scale field with the macro-scale field could be shown.